Is Motorola 68000 a RISC or CISC?
The Motorola 68000 (sometimes shortened to Motorola 68k or m68k and usually pronounced “sixty-eight-thousand”) is a 16/32-bit complex instruction set computer (CISC) microprocessor, introduced in 1979 by Motorola Semiconductor Products Sector.
What is the Motorola 68000?
The Motorola 68000 series (also known as 680×0, m68000, m68k, or 68k) is a family of 32-bit complex instruction set computer (CISC) microprocessors. During the 1980s and early 1990s, they were popular in personal computers and workstations and were the primary competitors of Intel’s x86 microprocessors.
What was the Motorola 68000 used in?
The Motorola 68000, also referred to as the 68000 or 68k, is a 16/32-bit CISC processor that was produced by Motorola’s Semiconductor Products Sector. The 68000 was used in the Apple Lisa and early models of Amiga, Atari ST, and Macintosh computers.
What do you mean by Motorola 68000 explain their mode of operation and addressing mode in brief?
In this mode, the operand is in memory. The address of the operand is the sum of the address in the program counter (PC) and the sign-extended 16-bit displacement integer in the extension word. The value in the PC is the address of the extension word.
What is the meaning of CISC?
Complex Instruction Set Computer
A computer in which individual instructions may perform many operations and take many cycles to execute, in contrast with reduced instruction set computer (RISC).
Is the Motorola 68000 still made?
Yes. They’re known as ColdFire processors now, and they’re sold by NXP. Coldfire is a rather different product, though. The instruction set is similar but not identical, and there’s no exposed memory bus.
What is easy 68k?
EASy68K is a 68000 Structured Assembly Language IDE. EASy68K allows you to edit, assemble and run 68000 programs on a Windows PC or Wine. No additional hardware is required. EASy68K is an open source project distributed under the GNU general public use license.
What is the 68000 processor inherent?
The 68000 processor is characterized by a 16-bit external word length as the processor chip has 16 data pins for connection to the memory. However, data are manipulated inside the processor in registers that contain the 32 bits.
How many classes of registers does the 68000 have?
As you know, the 68000 has a 32 bit Program Counter and 32 bit address registers. This is so because addresses of locations in memory are 32 bit numbers, and consequently you can address up to 232 locations, i.e. 232 bytes, or 4 gigabytes (each memory location is one byte).
What is CISC microprocessor?
CISC stands for Complex Instruction Set Computer. CISC processor is a classification of microprocessor-based of CPU design that operates on large and complex instruction sets so as to execute various tasks using the least possible codes. It is based on more than one instruction per cycle execution approach.
Why is CISC used?
CISC ARCHITECTURE CISC is the shorthand for Complex Instruction Set Computer. The CISC architecture tries to reduce the number of Instructions that a program has, thus optimizing the Instructions per Program part of the above equation. This is done by combining many simple instructions into a single complex one.